Saturday, November 22, 2008

Increased battery life

1. Understanding of memory effect
Battery memory effect refers to the irreversible failure of the Compaq 116314-001 battery, that battery failure can be re-back performance. Memory effect refers to a specific cell for a long time subjected to the work of the cycle, automatically keep this particular trend. The earliest definition of the nickel-cadmium batteries, Bag of nickel-cadmium battery memory effect does not exist, there are battery-sintering memory effect. Now, the nickel metal hydrogen (commonly known as Ni-MH) batteries from the memory effect of the definition of restraint.
Nickel-cadmium batteries because of modern technology improvements, the memory effect has been substantially reduced, while the other is to replace the definition of the nickel-based batteries is the “lattice” is usually the case, the nickel-cadmium batteries by the two The effect of the combined effects, and the Ni-MH Compaq 134111-B21 battery only by the “lattice” memory effect, and impact than the nickel-cadmium batteries for small.
In practice, the way memory effect on the Elimination of strict norms and operation of a process. Improper operation would be counter-productive.
For nickel-cadmium Compaq 135214-002 battery, regular maintenance is a deep discharge on a regular basis: the use of every month (or 30 cycles) to carry out a deep discharge (discharge to 1.0V / per session, foreigners call it exercise), usually used up as much as possible is the use of battery Or shut down, and other means can be used to alleviate the effects of memory formation, but this is not exercise, because the equipment (such as mobile phones) will not be used 1.0V / per session before the shutdown, it is necessary specialized equipment or line to complete this Work, but fortunately many of the Ni-MH battery charger with all the features.
For a long time not to carry out the exercise nickel-cadmium batteries, because of the cumulative effect of memory, can not restore the capacity for exercise, then you need to better discharge (called a foreigner recondition), which is a very small current to the Compaq 138184-001 battery for a long time 0.4V to discharge each of a process, the need for professional equipment.
For Ni-MH battery, exercise carried out by the frequency of about once every three months to ease the effective memory effect. Ni-MH battery because the cycle of life is far lower than the nickel-cadmium batteries, with almost no recondition this method.
▲ Recommendation 1: Every time charge of battery discharge before it is not necessary, but also harmful, because the Compaq 146252-B25 battery life short by a senseless.
▲ Recommendation 2: The next resistance of a battery is negative for the discharge is not desirable, the current can not control, easy to put off 0V, and even led to the series of batteries battery polarity reversal.

2. You need to activate the battery
The answer is the need to activate the Compaq 159524-001 battery, but this is not the users do. I visited the lithium-ion battery manufacturers, lithium-ion battery factory in the past to go through the process as follows:
Lithium-ion battery electrolyte impart SHELL — —- sealed into, that is, charging voltage, and then discharge, so for a few cycle, so that the full invasion electrode electrolyte, fully activated in order to meet the requirements of capacity, this is activated — Sub-process capacity is the capacity of the Compaq 182281-001 battery test to select a different performance (capacity) batteries are classified, the level of cell division, such as matching capacity. So out of the lithium-ion battery to the hands of the user is already activated off the . We used nickel cadmium batteries and nickel-metal hydride battery is activated into the case after the factory. Some of the batteries need to activate the battery in the process of opening, re-activated after sealing, that process may be only Compaq 292861-001 battery manufacturer to complete A.
Here there is a problem that is the factory of the battery cell to the hands of the user, this is sometimes a very long time, is short on a long six months, this time because the battery electrode materials will be passive, so the manufacturer recommends that first-time The best Compaq 190336-001 battery for 3 to 5 times completely put the process of filling in order to eliminate passivation of the electrode material, the maximum capacity.
In 2001, promulgated on the three Ni-MH. Lithium-ion and nickel-cadmium batteries in the national standard, and its initial capacity of the testing are clearly defined, the battery can charge 5 deep deep release, once in line with the requirements To stop the trial. This is a very good explanation of this phenomenon I am talking about.
★ so called “second-activated” can, first-time users of the “new” battery charge as much as possible to carry out several deep-release cycle.
● However, as far as I test (for lithium-ion battery), store in 1 to 3 months of the lithium-ion Compaq 191169-001 battery, and it’s Fang deep charge deep processing cycle, the capacity is almost non-existent

3. In the first three secondary charge you 12 hours
The problem is closely linked to the above-activated battery problem, set aside the battery factory to the hands of the users are passive electrodes, in order to activate the Compaq 247050-001 battery charge deep deep discharge cycle 3. In fact, this issue into a deep is not sufficient to Filling 12 hours. Well, my article of another film, “On the phone’s battery charging time” has answered the question.
★ ★ ★ The answer is no charge for 12 hours.
Early mobile phone Ni-MH battery because of the need to add and trickle charge process, it is necessary to achieve the best full charge, may need to 5 hours or so, but also do not need the 12 hours. And the current lithium-ion Compaq 192835-001 battery charging voltage Features is its decision to deep time without charge 12 hours.

The lithium-ion battery Some people may ask, since the constant pressure stage of the current lithium-ion battery gradually decreased when the current is not as small as infinitesimal when the real deep-sufficient. I have to draw current phase of the constant pressure to reduce the time Curve, curve fitting it on many occasions and found that the curve can be 1 / x function of the way and close to zero current, actual test lithium-ion Compaq 198709-001 battery Compaq 200002-001 battery because of the inherent self-discharge, this is a zero-current will never reach the .
To the 600mAh battery, for example, set up to current 0.01C (that is, 6mA), it’s not time to 1C charge more than 150 minutes, then set up to current 0.001C (that is, 0.6mA), it may be time charge for 10 hours — - Because of the precision instruments, has been unable to obtain accurate, but 0.001C from 0.01C to be calculated only by the capacity of the 1.7mAh, in order to make more use of more than 7 hours in exchange for just less than three thousandths of the Capacity is of no practical significance.

Moreover, there are other ways of charging, such as pulse charging methods to make lithium-ion Compaq 213282-001 battery 4.2V to reach the limit voltage, there is no deadline for it to determine the smallest current stage, after 150 minutes in general it is a full 100% charge. Are a number of mobile phone Pulse charging modes.

Some people have been using a mobile phone showed full charge, then charge for Wall Décor & Hangings phone to confirm the full extent of filling, the test in a slapdash way.
First of all, Wall Décor & Hangings show the green light detection is not really sufficient or not enough of a basis.
★ ★ testing lithium-ion rechargeable Compaq 222114-001 battery Compaq 229783-001 battery is full the only way to the ultimate test is not in charge (or discharge) when the lithium-ion battery voltage.
The so-called current phase of the constant pressure to reduce its real aim is to gradually reduce the resistance on the battery charge current arising as a result of the additional voltage, current as small as 0.01C, such as 6mA, with the battery by the current resistance (typically 200 Doses of Europe) is only 1mV, that this time the voltage is no current state of the battery voltage.
Second, the phone does not necessarily mean that the voltage of the Wall Décor & Hangings voltage, that the phone’s Compaq 231445-001 battery to full charge of the Wall Décor & Hangings, Wall Décor & Hangings do not have that full charge, but continue to charge.

4. Rechargeable batteries are the best you
There is a saying that the use of rechargeable batteries properly, in a certain period of the cycle scope of the best, is the largest capacity. This points to the case, sealed nickel metal hydride batteries and nickel-cadmium batteries, if used properly (such as regular maintenance to prevent the memory effect and have accumulated), usually 100 to 200 cycles Department reached its maximum capacity, such as The factory with a capacity of 1000mAh Ni-MH Compaq 232633-001 battery with 120 cycles, its capacity is likely to reach 1100mAh. Almost all of Japan Ni-MH battery manufacturer’s technical specifications described in the book nickel-based batteries cycle characteristics on the map and I can see such a description.
★ nickel-based batteries have the best general in the 100 to 200 cycles between its maximum capacity
The liquid lithium-ion batteries, but there is no such a cycle hump capacity, lithium-ion batteries from the factory to the final end-of-life battery, the capacity of its performance is to use a little time. I do lithium-ion batteries on the performance of the cycle when there has never seen signs of recovery capacity.
★ lithium-ion battery is no best.
It is worth mentioning that the lithium-ion Compaq 246437-002 battery is more vulnerable to changes in ambient temperature and the performance of different properties, in 25 to 40 degree temperature will show their best performance, and low or high temperature, his performance greatly on the . You have to make lithium-ion Compaq 239551-001 battery fully demonstrated its capacity must be careful attention to the use of the environment, the prevention of high-temperature phenomena, such as car phone on the first stage, directly at the sun can easily make more than 60 degrees, North of the user’s battery standby time, the same network, the user is no longer in the South.

5. Is really the greater the charge current, charge and the sooner you
“On the phone’s battery charging time,” an article in this issue has been talked about, the current charge of nickel-based batteries, can be said that while the corresponding lithium-ion battery, this is not entirely correct.
★ ★ for lithium-ion rechargeable Compaq 246437-001 battery, to a certain range of current (1.5C ~ 0.5C), to improve current methods of charging voltage current current value, not to shorten the full lithium-ion rechargeable battery.

Posted by popbattery in 04:06:24
Comments

2 Responses

  1. You still write on here! Thanks :)

  2. hammerbrown says:

    I really liked the way you have put effort to write this post, Great work, keep it up !

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